Rey Mourot

Global supraglacial microbiomes

Rey Mourot, Christoph Keuschnig, James A Bradley, Christopher B. Trivedi et autres

Microbial communities inhabiting supraglacial environments such as snow, bare ice, and cryoconite holes drive the biological darkening of glacier surfaces, reducing surface albedo and accelerating ice mass loss worldwide. Yet our understanding of what shapes their diversity and community structure across different …

Global supraglacial microbiomes

Rey Mourot, Christoph Keuschnig, James A Bradley, Christopher B. Trivedi et autres

Microbial communities inhabiting supraglacial environments such as snow, bare ice, and cryoconite holes drive the biological darkening of glacier surfaces, reducing surface albedo and accelerating ice mass loss worldwide. Yet our understanding of what shapes their diversity and community structure across different …

SIESTA Project: Svalbard summer 2025 expedition report

Rey Mourot, Sibylle Lebert, Eloi Martinez‐Rabert, Aude E Barani et autres

Microbial dormancy plays an important role in the persistence, dispersal, and functioning of microbial communities in moderate to extreme environments. The activity or inactivity of microbial communities also has implications for rates of biogeochemical transformations and thus elemental stocks and redox conditions. …

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Linking extreme light availability to cellular function in algae-dominated communities on the Greenland Ice Sheet

Helen K. Feord, Christoph Keuschnig, Christopher B. Trivedi, Rey Mourot et autres

Glacier ice algae of the streptophyte genus Ancylonema bloom on glaciers globally, including the Greenland Ice Sheet. These algae survive under extreme high light conditions in the summer, as well as under very low light or total darkness during (polar) winters and …

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Algae-dominated metaproteomes uncover cellular adaptations to life on the Greenland Ice Sheet

Helen K. Feord, Anke Trautwein‐Schult, Christoph Keuschnig, Anne Ostrzinski et autres

Eukaryotic algae-dominated microbiomes thrive on the Greenland Ice Sheet (GrIS) in harsh environmental conditions, including low temperatures, high light, and low nutrient availability. Chlorophyte algae bloom on snow, while streptophyte algae dominate bare ice surfaces. Empirical data about the cellular mechanisms responsible …

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Author Correction: Dynamics of organic matter in algal blooms on the Greenland ice sheet

Pamela E. Rossel, Runa Antony, Rey Mourot, Thorsten Dittmar et autres

This study is funded by the European Research Council (ERC) Synergy Grant DEEP PURPLE under the European Union’s Horizon 2020 research and innovation programme (Grant agreement No 856416). Open Access funding enabled and organized by Projekt DEAL.

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Cryo multi-scale microscopy visualization tools for studying microbial communities on glacier surfaces

Rey Mourot, Vladimir V. Roddatis, Alexandre Magno Anesio, Martyn Tranter et autres

In recent decades, a growing body of research has focused on characterizing supraglacial microbial communities. These studies have unveiled that pigmented glacier ice algae, namely, Ancylonema nordenskiöldii and Ancylonema alaskanum, blooming during the summer melt seasons accelerate surface melting. Most techniques that …

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Survival strategies of supraglacial algae-dominated communities in the transition from high light to continual darkness on the Greenland Ice Sheet

Helen K. Feord, Christoph Keuschnig, Christopher B. Trivedi, Rey Mourot et autres

Glacier ice algae of the streptophyte genus Ancylonema live on glaciers globally, including the Greenland Ice Sheet, and bloom despite low temperatures, low nutrient availability, and very high light intensities. In polar regions, the long polar night also imposes additional abiotic stressors. …

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Organic matter variability in algal dominated habitats on the Western Greenland Ice Sheet

Pamela E. Rossel, Runa Antony, Rey Mourot, Thorsten Dittmar et autres

Microbiological activity on glacier and ice sheet surfaces can be a major factor responsible for their darkening. Among microbes, pigmented snow- and glacial ice-algae increase light absorption, further accelerating melting and supporting the development of pigmented algal blooms on the Greenland Ice …

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Dynamics of organic matter in algal blooms on the Greenland ice sheet

Pamela E. Rossel, Runa Antony, Rey Mourot, Thorsten Dittmar et autres

Surface melting supports the development of pigmented algal blooms on the Greenland Ice Sheet, decreasing albedo and further accelerating melting. The interplay between carbon-fixing algae and carbon-respiring heterotrophic microorganisms ultimately controls the amount and composition of organic matter (OM) and thus the …

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Single-cell imaging reveals efficient nutrient uptake and growth of microalgae darkening the Greenland Ice Sheet

Laura Halbach, Katharina Kitzinger, Martin Asser Hansen, Sten Littmann et autres

Blooms of dark pigmented microalgae accelerate glacier and ice sheet melting by reducing the surface albedo. However, the role of nutrient availability in regulating algal growth on the ice remains poorly understood. Here, we investigate glacier ice algae on the Greenland Ice …

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Photosynthetic eukaryotes at the extremes: adaptations of glacier ice algae to life on the Greenland Ice Sheet

Helen K. Feord, Christoph Keuschnig, Christopher B. Trivedi, Liane G. Benning et autres